3 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
5 * This program and the accompanying materials are made available under the
6 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
7 * and is available at http://www.eclipse.org/legal/epl-v10.html
10 package org.opendaylight.controller.sal.packet;
12 import junit.framework.Assert;
14 import org.junit.Test;
15 import org.opendaylight.controller.sal.packet.BitBufferHelper;
17 public class BitBufferHelperTest {
20 public void testGetByte() {
21 byte[] data = { 100 };
22 Assert.assertTrue(BitBufferHelper.getByte(data) == 100);
26 public void testGetBits() throws Exception {
27 byte[] data = { 10, 12, 14, 20, 55, 69, 82, 97, 109, 117, 127, -50 };
30 bits = BitBufferHelper.getBits(data, 88, 8); //BYTE extraOffsetBits = extranumBits = 0
31 Assert.assertTrue(bits[0] == -50);
33 bits = BitBufferHelper.getBits(data, 8, 16); //Short
34 Assert.assertTrue(bits[0] == 12);
35 Assert.assertTrue(bits[1] == 14);
37 bits = BitBufferHelper.getBits(data, 32, 32); //Int
38 Assert.assertTrue(bits[0] == 55);
39 Assert.assertTrue(bits[1] == 69);
40 Assert.assertTrue(bits[2] == 82);
41 Assert.assertTrue(bits[3] == 97);
43 bits = BitBufferHelper.getBits(data, 16, 48); //Long
44 Assert.assertTrue(bits[0] == 14);
45 Assert.assertTrue(bits[1] == 20);
46 Assert.assertTrue(bits[2] == 55);
47 Assert.assertTrue(bits[3] == 69);
48 Assert.assertTrue(bits[4] == 82);
49 Assert.assertTrue(bits[5] == 97);
51 bits = BitBufferHelper.getBits(data, 40, 7); //BYTE extraOffsetBits = extranumBits != 0
52 Assert.assertTrue(bits[0] == 34);
54 bits = BitBufferHelper.getBits(data, 8, 13); //Short
55 Assert.assertTrue(bits[0] == 1);
56 Assert.assertTrue(bits[1] == -127);
58 bits = BitBufferHelper.getBits(data, 32, 28); //Int
59 Assert.assertTrue(bits[0] == 3);
60 Assert.assertTrue(bits[1] == 116);
61 Assert.assertTrue(bits[2] == 85);
62 Assert.assertTrue(bits[3] == 38);
64 bits = BitBufferHelper.getBits(data, 16, 41); //Long
65 Assert.assertTrue(bits[0] == 0);
66 Assert.assertTrue(bits[1] == 28);
67 Assert.assertTrue(bits[2] == 40);
68 Assert.assertTrue(bits[3] == 110);
69 Assert.assertTrue(bits[4] == -118);
70 Assert.assertTrue(bits[5] == -92);
72 bits = BitBufferHelper.getBits(data, 3, 7); //BYTE extraOffsetBits != 0; extranumBits == 0
73 Assert.assertTrue(bits[0] == 40);
75 bits = BitBufferHelper.getBits(data, 13, 16); //Short
76 Assert.assertTrue(bits[0] == -127);
77 Assert.assertTrue(bits[1] == -62);
79 bits = BitBufferHelper.getBits(data, 5, 32); //Int
80 Assert.assertTrue(bits[0] == 65);
81 Assert.assertTrue(bits[1] == -127);
82 Assert.assertTrue(bits[2] == -62);
83 Assert.assertTrue(bits[3] == -122);
85 bits = BitBufferHelper.getBits(data, 23, 48); //Long
86 Assert.assertTrue(bits[0] == 10);
87 Assert.assertTrue(bits[1] == 27);
88 Assert.assertTrue(bits[2] == -94);
89 Assert.assertTrue(bits[3] == -87);
90 Assert.assertTrue(bits[4] == 48);
91 Assert.assertTrue(bits[5] == -74);
93 bits = BitBufferHelper.getBits(data, 66, 9); //BYTE extraOffsetBits != 0; extranumBits != 0
94 Assert.assertTrue(bits[0] == 1);
95 Assert.assertTrue(bits[1] == 107);
97 bits = BitBufferHelper.getBits(data, 13, 15); //Short
98 Assert.assertTrue(bits[0] == 64);
99 Assert.assertTrue(bits[1] == -31);
101 bits = BitBufferHelper.getBits(data, 5, 29); //Int
102 Assert.assertTrue(bits[0] == 8);
103 Assert.assertTrue(bits[1] == 48);
104 Assert.assertTrue(bits[2] == 56);
105 Assert.assertTrue(bits[3] == 80);
107 bits = BitBufferHelper.getBits(data, 31, 43); //Long
108 Assert.assertTrue(bits[0] == 0);
109 Assert.assertTrue(bits[1] == -35);
110 Assert.assertTrue(bits[2] == 21);
111 Assert.assertTrue(bits[3] == 73);
112 Assert.assertTrue(bits[4] == -123);
113 Assert.assertTrue(bits[5] == -75);
115 bits = BitBufferHelper.getBits(data, 4, 12); //Short
116 Assert.assertTrue(bits[0] == 10);
117 Assert.assertTrue(bits[1] == 12);
119 byte[] data1 = { 0, 8 };
120 bits = BitBufferHelper.getBits(data1, 7, 9); //Short
121 Assert.assertTrue(bits[0] == 0);
122 Assert.assertTrue(bits[1] == 8);
124 byte[] data2 = { 2, 8 };
125 bits = BitBufferHelper.getBits(data2, 0, 7); //Short
126 Assert.assertTrue(bits[0] == 1);
128 bits = BitBufferHelper.getBits(data2, 7, 9); //Short
129 Assert.assertTrue(bits[0] == 0);
130 Assert.assertTrue(bits[1] == 8);
133 // [01101100][01100000]
136 public void testGetBytes() throws Exception {
137 byte data[] = { 108, 96, 125, -112, 5, 6, 108, 8, 9, 10, 11, 12, 13,
138 14, 15, 16, 17, 18, 19, 20, 21, 22 };
141 Assert.assertTrue(BitBufferHelper.getBits(data, 0, 8)[0] == 108);
142 Assert.assertTrue(BitBufferHelper.getBits(data, 8, 8)[0] == 96);
144 x = BitBufferHelper.getBits(data, 0, 10);
145 Assert.assertTrue(x[0] == 1);
146 Assert.assertTrue(x[1] == -79);
148 x = BitBufferHelper.getBits(data, 3, 8);
149 Assert.assertTrue(x[0] == 99);
150 //Assert.assertTrue(x[1] == 97);
155 public void testMSBMask() {
156 int numBits = 1; //MSB
157 int mask = BitBufferHelper.getMSBMask(numBits);
158 Assert.assertTrue(mask == 128);
161 mask = BitBufferHelper.getMSBMask(numBits);
162 Assert.assertTrue(mask == 255);
165 mask = BitBufferHelper.getMSBMask(numBits);
166 Assert.assertTrue(mask == 192);
170 public void testLSBMask() {
171 int numBits = 1; //LSB
172 int mask = BitBufferHelper.getLSBMask(numBits);
173 Assert.assertTrue(mask == 1);
176 mask = BitBufferHelper.getLSBMask(numBits);
177 Assert.assertTrue(mask == 7);
180 mask = BitBufferHelper.getLSBMask(numBits);
181 Assert.assertTrue(mask == 255);
185 public void testToByteArray() {
186 short sh = Short.MAX_VALUE;
187 byte[] data_sh = new byte[Byte.SIZE / 8];
188 data_sh = BitBufferHelper.toByteArray(sh);
189 Assert.assertTrue(data_sh[0] == 127);
190 Assert.assertTrue(data_sh[1] == -1);
192 short sh2 = Short.MIN_VALUE;
193 byte[] data_sh2 = new byte[Byte.SIZE / 8];
194 data_sh2 = BitBufferHelper.toByteArray(sh2);
195 Assert.assertTrue(data_sh2[0] == -128);
196 Assert.assertTrue(data_sh2[1] == 0);
199 byte[] data_sh3 = new byte[Byte.SIZE / 8];
200 data_sh3 = BitBufferHelper.toByteArray(sh3);
201 Assert.assertTrue(data_sh3[0] == 64);
202 Assert.assertTrue(data_sh3[1] == 0);
204 short sh4 = 146; //TCP headerlenflags - startoffset = 103
205 byte[] data_sh4 = new byte[Byte.SIZE / 8];
206 data_sh4 = BitBufferHelper.toByteArray(sh4);
207 Assert.assertTrue(data_sh4[0] == 0);
208 Assert.assertTrue(data_sh4[1] == -110);
210 short sh4_2 = 5000; //IPv4 Offset - startOffset = 51 (to 63)
211 byte[] data_sh4_2 = new byte[Byte.SIZE / 8];
212 data_sh4_2 = BitBufferHelper.toByteArray(sh4_2);
213 Assert.assertTrue(data_sh4_2[0] == 19);
214 Assert.assertTrue(data_sh4_2[1] == -120);
216 short sh4_3 = 5312; //numEndRestBits < numBitstoShiftBy
217 byte[] data_sh4_3 = new byte[Byte.SIZE / 8];
218 data_sh4_3 = BitBufferHelper.toByteArray(sh4_3);
219 Assert.assertTrue(data_sh4_3[0] == 20);
220 Assert.assertTrue(data_sh4_3[1] == -64);
222 int Int = Integer.MAX_VALUE;
223 byte[] data_Int = new byte[Integer.SIZE / 8];
224 data_Int = BitBufferHelper.toByteArray(Int);
225 Assert.assertTrue(data_Int[0] == 127);
226 Assert.assertTrue(data_Int[1] == -1);
227 Assert.assertTrue(data_Int[2] == -1);
228 Assert.assertTrue(data_Int[3] == -1);
230 int Int2 = Integer.MIN_VALUE;
231 byte[] data_Int2 = new byte[Integer.SIZE / 8];
232 data_Int2 = BitBufferHelper.toByteArray(Int2);
233 Assert.assertTrue(data_Int2[0] == -128);
234 Assert.assertTrue(data_Int2[1] == 0);
235 Assert.assertTrue(data_Int2[2] == 0);
236 Assert.assertTrue(data_Int2[3] == 0);
238 int Int3 = 1077952576;
239 byte[] data_Int3 = new byte[Integer.SIZE / 8];
240 data_Int3 = BitBufferHelper.toByteArray(Int3);
241 Assert.assertTrue(data_Int3[0] == 64);
242 Assert.assertTrue(data_Int3[1] == 64);
243 Assert.assertTrue(data_Int3[2] == 64);
244 Assert.assertTrue(data_Int3[3] == 64);
246 long Lng = Long.MAX_VALUE;
247 byte[] data_lng = new byte[Long.SIZE / 8];
248 data_lng = BitBufferHelper.toByteArray(Lng);
249 Assert.assertTrue(data_lng[0] == 127);
250 Assert.assertTrue(data_lng[1] == -1);
251 Assert.assertTrue(data_lng[2] == -1);
252 Assert.assertTrue(data_lng[3] == -1);
253 Assert.assertTrue(data_lng[4] == -1);
254 Assert.assertTrue(data_lng[5] == -1);
255 Assert.assertTrue(data_lng[6] == -1);
256 Assert.assertTrue(data_lng[7] == -1);
258 long Lng2 = Long.MIN_VALUE;
259 byte[] data_lng2 = new byte[Long.SIZE / 8];
260 data_lng2 = BitBufferHelper.toByteArray(Lng2);
261 Assert.assertTrue(data_lng2[0] == -128);
262 Assert.assertTrue(data_lng2[1] == 0);
263 Assert.assertTrue(data_lng2[2] == 0);
264 Assert.assertTrue(data_lng2[3] == 0);
265 Assert.assertTrue(data_lng2[4] == 0);
266 Assert.assertTrue(data_lng2[5] == 0);
267 Assert.assertTrue(data_lng2[6] == 0);
268 Assert.assertTrue(data_lng2[7] == 0);
270 byte B = Byte.MAX_VALUE;
271 byte[] data_B = new byte[Byte.SIZE / 8];
272 data_B = BitBufferHelper.toByteArray(B);
273 Assert.assertTrue(data_B[0] == 127);
275 byte B1 = Byte.MIN_VALUE;
276 byte[] data_B1 = new byte[Byte.SIZE / 8];
277 data_B1 = BitBufferHelper.toByteArray(B1);
278 Assert.assertTrue(data_B1[0] == -128);
281 byte[] data_B2 = new byte[Byte.SIZE / 8];
282 data_B2 = BitBufferHelper.toByteArray(B2);
283 Assert.assertTrue(data_B2[0] == 64);
286 byte[] data_B3 = new byte[Byte.SIZE / 8];
287 data_B3 = BitBufferHelper.toByteArray(B3);
288 Assert.assertTrue(data_B3[0] == 32);
293 public void testToByteArrayVariable() {
296 data_sh = BitBufferHelper.toByteArray(511, len);
297 Assert.assertTrue(data_sh[0] == (byte) 255);
298 Assert.assertTrue(data_sh[1] == (byte) 128);
300 data_sh = BitBufferHelper.toByteArray((int) 511, len);
301 Assert.assertTrue(data_sh[0] == (byte) 255);
302 Assert.assertTrue(data_sh[1] == (byte) 128);
304 data_sh = BitBufferHelper.toByteArray((long) 511, len);
305 Assert.assertTrue(data_sh[0] == (byte) 255);
306 Assert.assertTrue(data_sh[1] == (byte) 128);
310 public void testToInt() {
312 Assert.assertTrue(BitBufferHelper.toNumber(data) == 1);
314 byte data2[] = { 1, 1 };
315 Assert.assertTrue(BitBufferHelper.toNumber(data2) == 257);
317 byte data3[] = { 1, 1, 1 };
318 Assert.assertTrue(BitBufferHelper.toNumber(data3) == 65793);
322 public void testToLongGetter() {
323 byte data[] = { 1, 1 };
324 Assert.assertTrue(BitBufferHelper.getLong(data) == 257L);
328 public void testSetByte() throws Exception {
330 byte[] data = new byte[20];
333 BitBufferHelper.setByte(data, input, 0, Byte.SIZE);
334 Assert.assertTrue(data[0] == 125);
337 BitBufferHelper.setByte(data, input, 152, Byte.SIZE);
338 Assert.assertTrue(data[19] == 109);
342 public void testSetBytes() throws Exception {
343 byte[] input = { 0, 1 };
344 byte[] data = { 6, 0 };
346 BitBufferHelper.setBytes(data, input, 7, 9);
347 Assert.assertTrue(data[0] == 6);
348 Assert.assertTrue(data[1] == 1);
352 //INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
353 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001]*/
354 public void testInsertBits() throws Exception {
355 //CASE 1: startOffset%8 == 0 && numBits%8 == 0
356 byte inputdata[] = { 75, 110, 107, 80, 10, 12, 35, 100, 125, 65 };
360 byte data1[] = new byte[2];
363 BitBufferHelper.insertBits(data1, inputdata, startOffset, numBits);
364 Assert.assertTrue(data1[0] == 75);
365 Assert.assertTrue(data1[1] == 110);
367 byte data2[] = new byte[4];
370 BitBufferHelper.insertBits(data2, inputdata, startOffset, numBits);
371 Assert.assertTrue(data2[0] == 75);
372 Assert.assertTrue(data2[1] == 110);
373 Assert.assertTrue(data2[2] == 107);
374 Assert.assertTrue(data2[3] == 80);
376 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
377 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] // OUTPUT: [01001011] [01101000] = {75, 104}
378 byte data10[] = new byte[2];
381 BitBufferHelper.insertBits(data10, inputdata, startOffset, numBits);
382 Assert.assertTrue(data10[0] == 75);
383 Assert.assertTrue(data10[1] == 104);
385 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
386 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] // OUTPUT: [01001000] = {72}
387 byte data11[] = new byte[4];
390 BitBufferHelper.insertBits(data11, inputdata, startOffset, numBits);
391 Assert.assertTrue(data11[1] == 72);
393 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
394 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01101000] = {75, 110, 105}
395 byte data12[] = new byte[4];
398 BitBufferHelper.insertBits(data12, inputdata, startOffset, numBits);
399 Assert.assertTrue(data12[0] == 75);
400 Assert.assertTrue(data12[1] == 110);
401 Assert.assertTrue(data12[2] == 106);
403 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
404 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01100000] = {75, 110, 96}
405 byte data13[] = new byte[4];
408 BitBufferHelper.insertBits(data13, inputdata, startOffset, numBits);
409 Assert.assertTrue(data13[1] == 75);
410 Assert.assertTrue(data13[2] == 110);
411 Assert.assertTrue(data13[3] == 96);
413 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
414 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01101011] [10100000]= {75, 110, 107, 80}
415 byte data14[] = new byte[4];
418 BitBufferHelper.insertBits(data14, inputdata, startOffset, numBits);
419 Assert.assertTrue(data14[0] == 75);
420 Assert.assertTrue(data14[1] == 110);
421 Assert.assertTrue(data14[2] == 107);
422 Assert.assertTrue(data14[3] == 80);
424 //CASE 3: startOffset%8 != 0, numBits%8 = 0
425 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
426 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00001001] [11000000] = {72, 96}
427 byte data16[] = new byte[5];
430 BitBufferHelper.insertBits(data16, inputdata, startOffset, numBits);
431 Assert.assertTrue(data16[0] == 9);
432 Assert.assertTrue(data16[1] == 96);
433 Assert.assertTrue(data16[2] == 0);
435 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
436 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
437 // OUTPUT: [00000100] [1011 0110] [1110 0000] = {4, -54, -96}
441 byte data17[] = new byte[5];
442 BitBufferHelper.insertBits(data17, inputdata, startOffset, numBits);
443 Assert.assertTrue(data17[0] == 9);
444 Assert.assertTrue(data17[1] == 109);
445 Assert.assertTrue(data17[2] == -64);
446 Assert.assertTrue(data17[3] == 0);
448 // INPUT: {79, 110, 111}
449 // = [01001111] [01101110] [01101111]
450 //OUTPUT: [0000 1001] [1110 1101] [110 00000] = {9, -19, -64}
451 byte data18[] = new byte[5];
452 byte inputdata3[] = { 79, 110, 111 };
455 BitBufferHelper.insertBits(data18, inputdata3, startOffset, numBits);
456 Assert.assertTrue(data18[0] == 9);
457 Assert.assertTrue(data18[1] == -19);
458 Assert.assertTrue(data18[2] == -64);
460 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
461 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
462 // OUTPUT: [0000 1001] [0110 1101] [1100 1101] [0110 1010] [0000 0001] = {9, 109, -51, 106, 0}
466 byte data19[] = new byte[5];
467 BitBufferHelper.insertBits(data19, inputdata, startOffset, numBits);
468 Assert.assertTrue(data19[0] == 9);
469 Assert.assertTrue(data19[1] == 109);
470 Assert.assertTrue(data19[2] == -51);
471 Assert.assertTrue(data19[3] == 106);
472 Assert.assertTrue(data19[4] == 0);
474 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
475 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
476 // OUTPUT: data[4, 5, 6] = [0 010 0101] [1 011 0111] [0 000 0000] = {37, -73, 0}
479 byte data20[] = new byte[7];
480 BitBufferHelper.insertBits(data20, inputdata, startOffset, numBits);
481 Assert.assertTrue(data20[4] == 37);
482 Assert.assertTrue(data20[5] == -73);
483 Assert.assertTrue(data20[6] == 0);
485 //CASE 4: extranumBits != 0 AND extraOffsetBits != 0
486 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
487 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
488 // OUTPUT: [0000 1001] [0100 0000] = {9, 96}
491 byte data21[] = new byte[7];
492 BitBufferHelper.insertBits(data21, inputdata, startOffset, numBits);
493 Assert.assertTrue(data21[0] == 9);
494 Assert.assertTrue(data21[1] == 64);
495 Assert.assertTrue(data21[2] == 0);
497 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
498 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
499 // OUTPUT: data = [00000 010] [01011 011] [01110 000] = {37, -73, 0}
502 byte data22[] = new byte[7];
503 BitBufferHelper.insertBits(data22, inputdata, startOffset, numBits);
504 Assert.assertTrue(data22[0] == 2);
505 Assert.assertTrue(data22[1] == 91);
506 Assert.assertTrue(data22[2] == 112);
508 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
509 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
510 // OUTPUT: [0000 1001] [0110 1101] [110 01101] [01 00000] = {9, 109, -51, 64}
513 byte data23[] = new byte[7];
514 BitBufferHelper.insertBits(data23, inputdata, startOffset, numBits);
515 Assert.assertTrue(data23[0] == 9);
516 Assert.assertTrue(data23[1] == 109);
517 Assert.assertTrue(data23[2] == -51);
518 Assert.assertTrue(data23[3] == 64);
520 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
521 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
522 // OUTPUT: [0000 1001] [0110 1101] = {9, 109}
525 byte data24[] = new byte[7];
526 BitBufferHelper.insertBits(data24, inputdata, startOffset, numBits);
527 Assert.assertTrue(data24[0] == 9);
528 Assert.assertTrue(data24[1] == 109);
529 Assert.assertTrue(data24[2] == 0);
531 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
532 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
533 // OUTPUT: [0000 0100] [1011 0110] [1110 0110] = {4, -74, -26}
536 byte data25[] = new byte[7];
537 BitBufferHelper.insertBits(data25, inputdata, startOffset, numBits);
538 Assert.assertTrue(data25[0] == 4);
539 Assert.assertTrue(data25[1] == -74);
540 Assert.assertTrue(data25[2] == -26);
541 Assert.assertTrue(data25[3] == -0);
543 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
544 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
545 // OUTPUT: [0000 0010] [0101 1011] = {0, 2, 91, 0}
548 byte data26[] = new byte[7];
549 BitBufferHelper.insertBits(data26, inputdata, startOffset, numBits);
550 Assert.assertTrue(data26[0] == 0);
551 Assert.assertTrue(data26[1] == 2);
552 Assert.assertTrue(data26[2] == 91);
553 Assert.assertTrue(data26[3] == 0);
555 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
556 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
557 // OUTPUT: [000 01001] [011 01101] [110 0 0000] = {9, 109, -64, 0}
560 byte data27[] = new byte[7];
561 BitBufferHelper.insertBits(data27, inputdata, startOffset, numBits);
562 Assert.assertTrue(data27[0] == 9);
563 Assert.assertTrue(data27[1] == 109);
564 Assert.assertTrue(data27[2] == -64);
565 Assert.assertTrue(data27[3] == 0);
567 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
568 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
569 // OUTPUT: [00 000000] [00 000000] [00 010010] [11 011011] [10 011010] [11 010100] [0000 0000] = {0, 0, 18, -37,-102,-44,0}
572 byte data28[] = new byte[7];
573 BitBufferHelper.insertBits(data28, inputdata, startOffset, numBits);
574 Assert.assertTrue(data28[0] == 0);
575 Assert.assertTrue(data28[1] == 0);
576 Assert.assertTrue(data28[2] == 18);
577 Assert.assertTrue(data28[3] == -37);
578 Assert.assertTrue(data28[4] == -102);
579 Assert.assertTrue(data28[5] == -44);
580 Assert.assertTrue(data28[6] == 0);
585 public void testGetShort() throws Exception {
586 byte data[] = new byte[2];
589 int length = 9; // num bits
590 Assert.assertTrue(BitBufferHelper.getShort(data, length) == 264);
594 short result = BitBufferHelper.getShort(data, length);
595 Assert.assertTrue(result == 8);
599 result = BitBufferHelper.getShort(data, length);
600 Assert.assertTrue(result == 47);
602 //[0000 0001] [0001 0100] [0110 0100]
603 byte[] data1 = new byte[2];
605 data1[1] = 20; //data1[2] = 100;
607 result = BitBufferHelper.getShort(data1, length);
608 Assert.assertTrue(result == 276);
610 byte[] data2 = new byte[2];
612 data2[1] = 99; //data2[2] = 100;
614 result = BitBufferHelper.getShort(data2, length);
615 Assert.assertTrue(result == 99);
617 byte[] data3 = { 100, 50 };
618 result = BitBufferHelper.getShort(data3);
619 Assert.assertTrue(result == 25650);
623 public void testToIntVarLength() throws Exception {
624 byte data[] = { (byte) 255, (byte) 128 };
625 int length = 9; // num bits
626 Assert.assertTrue(BitBufferHelper.getInt(data, length) == 384);
628 byte data2[] = { 0, 8 };
629 Assert.assertTrue(BitBufferHelper.getInt(data2, 9) == 8);
631 byte data3[] = { 1, 1, 1 };
632 Assert.assertTrue(BitBufferHelper.getInt(data3) == 65793);
634 byte data4[] = { 1, 1, 1 };
635 Assert.assertTrue(BitBufferHelper.getInt(data4) == 65793);
637 byte data5[] = { 1, 1 };
638 Assert.assertTrue(BitBufferHelper.getInt(data5) == 257);
643 public void testShiftBitstoLSB() {
644 byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
646 byte[] data2 = { 8, 9, 10 };
647 byte[] shiftedBytes2 = BitBufferHelper.shiftBitsToLSB(data2, 11);
649 Assert.assertTrue(shiftedBytes2[0] == 0);
650 Assert.assertTrue(shiftedBytes2[1] == 64);
651 Assert.assertTrue(shiftedBytes2[2] == 72);
653 byte[] shiftedBytes = BitBufferHelper.shiftBitsToLSB(data, 49);
655 Assert.assertTrue(shiftedBytes[0] == 0);
656 Assert.assertTrue(shiftedBytes[1] == 2);
657 Assert.assertTrue(shiftedBytes[2] == 4);
658 Assert.assertTrue(shiftedBytes[3] == 6);
659 Assert.assertTrue(shiftedBytes[4] == 8);
660 Assert.assertTrue(shiftedBytes[5] == 10);
661 Assert.assertTrue(shiftedBytes[6] == 12);
662 Assert.assertTrue(shiftedBytes[7] == 14);
663 Assert.assertTrue(shiftedBytes[8] == 16);
664 Assert.assertTrue(shiftedBytes[9] == 18);
666 byte[] data1 = { 1, 2, 3 };
667 byte[] shiftedBytes1 = BitBufferHelper.shiftBitsToLSB(data1, 18);
668 Assert.assertTrue(shiftedBytes1[0] == 0);
669 Assert.assertTrue(shiftedBytes1[1] == 4);
670 Assert.assertTrue(shiftedBytes1[2] == 8);
675 public void testShiftBitstoLSBMSB() {
676 byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
678 byte[] clone = BitBufferHelper.shiftBitsToMSB(BitBufferHelper
679 .shiftBitsToLSB(data, 72), 72);
681 Assert.assertTrue(clone[0] == 1);
682 Assert.assertTrue(clone[1] == 2);
683 Assert.assertTrue(clone[2] == 3);
684 Assert.assertTrue(clone[3] == 4);
685 Assert.assertTrue(clone[4] == 5);
686 Assert.assertTrue(clone[5] == 6);
687 Assert.assertTrue(clone[6] == 7);
688 Assert.assertTrue(clone[7] == 8);
689 Assert.assertTrue(clone[8] == 9);
690 Assert.assertTrue(clone[9] == 0);